Annubar flowmeter (also known as flute-shaped constant velocity tube flowmeter) is a new type of differential pressure flow detection component developed based on the principle of pitot tube velocity measurement. Its output is a differential pressure signal, which is matched with instruments for measuring differential pressure. It can accurately measure the flow of various liquids, gases and steam (superheated steam and saturated steam) in circular pipes and rectangular pipes, and gradually replace the orifice plate and other with its advantages of high precision, small pressure loss and easy installation. Detection components are widely used in industries such as power industry (including nuclear industry), chemical industry, petroleum and metal smelting.
To the pressure transmitters.
1. The industrial production process
Flow meter is one of the large-scale instruments in process automation instruments and devices. It is widely used in metallurgy, electric power, coal, chemical, petroleum, transportation, construction, textile, food, medicine, agriculture, environmental protection and people's daily life. In all areas of the national economy, it is an important tool for developing industrial and agricultural production, saving energy, improving product quality, and improving economic efficiency and management level. It plays an important role in the national economy. In process automation instruments and devices, flow meters have two functions: as a test instrument for the process automation control system and a total meter for measuring the quantity of materials.
2. Energy measurement
Energy is divided into primary energy (coal, crude oil, coalbed methane, petroleum gas and natural gas), secondary energy (electricity, coke, artificial gas, refined oil, liquefied petroleum gas, steam) and energy-carrying medium (compressed air, oxygen, Nitrogen, hydrogen, water, etc. Energy metering is an important means of scientifically managing energy, achieving energy conservation and reducing consumption, and improving economic efficiency. Flow meters are an important part of energy metering. Water, artificial gas, natural gas, steam and oil use a very large number of flow meters, which are indispensable tools for energy management and economic accounting.
3.Environmental protection engineering
The emissions of flue gas, waste liquid, sewage, etc. seriously pollute the atmosphere and water resources, and seriously threaten the human living environment. The country regards sustainable development as a national policy, and environmental protection will be the biggest issue in the 21st century. Air and water pollution must be controlled, management must be strengthened, and management is based on quantitative control of pollution.
China is a country with coal as its main source of energy. There are millions of chimneys in the country that continuously emit smoke into the atmosphere. Flue gas emission control is an important project to cure pollution. Each chimney must be equipped with a flue gas analysis instrument and a flow meter to form a flail emission monitoring system. The flow rate of flue gas is very difficult. The difficulty is that the chimney is large in size and irregular in shape, the gas composition changes indefinitely, the flow rate range is large, dirt, dust, corrosion, high temperature, and no straight pipe section.
There are five ways: railway, air, water, and pipeline transportation. Although pipeline transportation has already existed, the application is not common. With environmental issues
The outstanding characteristics of pipeline transportation have attracted people's attention. Pipeline transportation must be equipped with a flow meter, which is the eye for control, distribution and dispatch, and is an indispensable tool for safety monitoring and economic accounting.
The 21st century will usher in the century of life sciences, and industries characterized by biotechnology will develop rapidly. There are many substances that need to be monitored in biotechnology, such as blood and urine. Instrument development is extremely difficult and varied.
The flowmeters required for scientific experiments are not only numerous, but also extremely versatile. According to statistics, a large part of the flowmeters are used for scientific research. They are not mass-produced and are sold in the market. Many scientific research institutions and large enterprises have set up special teams to develop special flowmeters.
7.Marine meteorology, rivers and lakes
These areas are open flow paths, which are typically measured and then the flow is estimated. The physical principles and hydrodynamics of the flowmeter and flowmeter are common, but the principle and structure of the instrument and the conditions of use vary widely.
1. The unique internal secondary average structure provides high precision (±1% reading) and high repeatability (±0.1%).
2. The outer impact tube of the Annubar flowmeter is processed by a whole piece of material without welding. Compared with the similar products welded by the double-body structure, it has natural high strength and is also convenient to use high temperature resistance and resistance. Corrosive material.
3. Honeycomb hexagonal stable structure produces a unique beam distribution shape, which ensures the stability of the low voltage signal, produces a higher differential pressure than similar products, and increases the turndown ratio.
4. Suitable for square or rectangular pipes.
5. For the inevitable clogging problem of similar products in the measurement of dirty media, there are online pull-out type or manual and automatic purging schemes and devices to achieve non-stop production maintenance.
6. Average speed tube + three valve group + temperature and pressure compensation + transmitter, which constitutes an integrated structure and is easy to use.
7, no flow coefficient drift, long-term stability.
8. Provide intuitive resonance check to ensure long-term stable operation.
9, pressure loss, low energy consumption, significant energy saving effect
10, easy to install and save labor, low price and fast delivery (3-5 days)
Annubar flowmeter is an ideal substitute for orifice plate because of its simple installation, low pressure loss, high strength, no wear and no leakage. It can be widely used in industrial and mining enterprises to measure the flow of blast furnace gas, compressed air, steam and other liquids and gases. Understanding the application and advantages of the Annubar flowmeter can help us improve production efficiency.